C语言下的学生管理系统(含密码加密和验证码)

C语言学生管理系统代码
简介
学生管理系统是一个用于管理学生信息的简单程序，它可以实现添加学生信息、显示学生信息、修改学生信息和删除学生信息等功能。

通过这个系统，学校或机构可以更方便地管理和维护学生的相关数据。

功能
1.添加学生信息：通过输入学生的姓名、学号、年龄和性别等信息，将
学生信息存储在系统中。

每个学生信息包括学号、姓名、年龄和性别等关键信息。

2.显示学生信息：可以显示系统中所有学生的信息，包括学号、姓名、
年龄和性别。

3.修改学生信息：通过输入学生的学号，可以修改该学生的姓名、年龄
和性别等信息。

4.删除学生信息：通过输入学生的学号，可以删除该学生的信息。

实现
下面是一个简单的C语言学生管理系统代码示例：
```c #include <stdio.h> #include <string.h>
#define MAX_STUDENTS 100
// 定义学生结构体 struct Student { int id; char name[100]; int age; char
gender[10]; };
// 定义全局变量，用于存储学生信息和统计学生数量 struct Student
students[MAX_STUDENTS]; int num_students = 0;
// 添加学生 void addStudent() { if (num_students >= MAX_STUDENTS) { printf(。

/*带有登陆功能的学生信息管理系统，其中管理员账号为：admin 密码为：123456*/ #include<stdio.h>#define STU_NUM 50 //学生数量typedef struct{char ID[50]; //学生学号char name[30]; //学生姓名char password[50]; //学生登录密码char class[20]; //学生班级int math_score; //数学成绩int C_score; // C语言成绩int OS_score; //操作系统成绩int age; //年龄}STU;typedef struct{char user[30];char key[50];}Admin;int Student_Num=0;Admin admin[1]={"admin","123456"};STU student[STU_NUM];char login_user[50]; //存储当前登陆用户名char logpassword[50]; //存储当前登陆密码//保存到文件void save(){FILE *fp;int d;if((fp=fopen("stu.dat","wb"))==NULL){printf("can not open data file!\n");return;}fwrite(&Student_Num,sizeof(int),1,fp);for(d=0;d<STU_NUM;d++)if(fwrite(&student[d],sizeof(STU),1,fp)!=1)printf("file write error\n");fclose(fp);}//将文件内容装载到相应数组void load(){FILE *fp;int e;if((fp=fopen("stu.dat","rb"))==NULL){printf("can not open file\n");return;}fread(&Student_Num,sizeof(int),1,fp);for(e=0;e<STU_NUM;e++)if(fread(&student[e],sizeof(STU),1,fp)!=1){if(feof(fp)){fclose(fp);return;}printf("file read error\n");}fclose(fp);}//管理员登陆int admin_login_confirm(){Admin temp;int wt=0;int confirm=0;do{printf("input your username:");scanf("%s",er);printf("input your password:");scanf("%s",temp.key);if(strcmp(er,admin[0].user)==0 && strcmp(temp.key,admin [0].key)==0){confirm=1;break;}else{confirm=0;wt++;printf("wrong password! \n");}}while(wt<3);return confirm;}int check(char ck[50]){int check=0;int ckflag=0;for(check=0;check<Student_Num;check++){if(strcmp(ck,student[check].ID)==0)ckflag=1;return ckflag;}return ckflag;}//学生登录int student_login(){int a;int ok=0;int wrong=0;STU tem;do{printf("user_ID:");scanf("%s",tem.ID);printf("password:");scanf("%s",tem.password);for(a=0;a<Student_Num;a++){if(strcmp(tem.ID,student[a].ID)==0 && strcmp(tem.password,student[a].password)==0){strcpy(login_user,student[a].ID);strcpy(logpassword,student[a].password);ok=1;break;}else{ok=0;}}if(ok==0){wrong++;printf("wrong password\n");}elsebreak;}while(wrong<3);return ok;}//添加学生信息void Add_student(){printf("ID:");scanf("%s",student[Student_Num].ID);while(check(student[Student_Num].ID)==1){printf("the ID is already have!\n");printf("ID:");scanf("%s",student[Student_Num].ID);}printf("name:");scanf("%s",student[Student_Num].name);printf("password:");scanf("%s",student[Student_Num].password);printf("class:");scanf("%s",student[Student_Num].class);printf("math_score:");scanf("%d",&student[Student_Num].math_score);printf("C_score:");scanf("%d",&student[Student_Num].C_score);printf("OS_score:");scanf("%d",&student[Student_Num].OS_score);printf("age:");scanf("%d",&student[Student_Num].age);Student_Num++;}//显示学生信息void display_student(){int b;printf("ID\tname\tclass\tmath_score\tC_score\t\tOS_score\tage\n");for(b=0;b<Student_Num;b++){printf("%s\t%s\t%s\t%d\t\t%d\t\t%d\t\t%d",student[b].ID,student[b].name,student[b].class,student[b].math_sc ore,student[b].C_score,student[b].OS_score,student[b].age);printf("\n");}}//更改学生信息void alter_student(){char alter[50];STU ch;int al,change=0;printf("the ID you want to change:");scanf("%s",alter);for(al=0;al<STU_NUM;al++){if(strcmp(alter,student[al].ID)==0){printf("ID:");scanf("%s",ch.ID);while(check(ch.ID)==1){printf("the ID is already have!\n");printf("ID:");scanf("%s",ch.ID);}printf("name:");scanf("%s",);printf("password:");scanf("%s",ch.password);printf("class:");scanf("%s",ch.class);printf("math_score:");scanf("%d",&ch.math_score);printf("C_score:");scanf("%d",&ch.C_score);printf("OS_score:");scanf("%d",&ch.OS_score);printf("age:");scanf("%d",&ch.age);printf("are you sure you want to change? (Y/N)[ ]\b\b");if(getchar()=='Y'||getchar()=='y'){student[al]=ch;change=1; break;}}}if(change==0) printf("no such user");save();}//查找void search(){char search[50];int sc;printf("the ID you want to search:");scanf("%s",search);for(sc=0;sc<STU_NUM;sc++){if(strcmp(search,student[sc].ID)==0) {printf("ID\tname\tclass\tmath_score\tC_score\t\tOS_score\tage\n");printf("%s\t%s\t%s\t%d\t\t%d\t\t%d\t\t%d",student[sc].ID,student[sc].name,student[sc].class,student[sc].math_ score,student[sc].C_score,student[sc].OS_score,student[sc].age);printf("\n");break;}}if(sc>=STU_NUM) printf("no such student!\n");}//删除void delete_student(){char del[50];STU dele;int de;printf("the ID you want to delete:");scanf("%s",del);for(de=0;de<STU_NUM;de++){if(strcmp(del,student[de].ID)==0) {printf("ID\tname\tclass\tmath_score\tC_score\t\tOS_score\tage\n");printf("%s\t%s\t%s\t%d\t\t%d\t\t%d\t\t%d",student[de].ID,student[de].name,student[de].class,student[de].mat h_score,student[de].C_score,student[de].OS_score,student[de].age);printf("\n");break;}}if(de>=STU_NUM) printf("no such student!\n");else{printf("are you sure you want to delete? y/n [ ]\b\b");if(getchar()=='Y'||getchar()=='y'){dele=student[de];student[de]=student[Student_Num-1];student[Student_Num-1]=dele;Student_Num--;}}save();}//更改学生登录密码void change_password(){char ps1[50],ps2[50],old[50];int point=0;int inputcnt=1;printf("please input your old password:");scanf("%s",old);while(strcmp(old,logpassword)!=0){printf("old password is wrong!\n");printf("please input your old password:");scanf("%s",old);if(inputcnt>=2) { printf("you have wrong 3 times!\n"); return;}inputcnt++;}printf("input new password:");scanf("%s",ps1);printf("confirm new password:");scanf("%s",ps2);if(strcmp(ps1,ps2)==0){printf("Are you sure to change? y/n [ ]\b\b");if(getchar()=='Y'||getchar()=='y'){for(point=0;point<Student_Num;point++){if(strcmp(login_user,student[point].ID)==0){strcpy(student[point].password,ps1);save();break;}}}}}//显示主菜单void display_Main_Menu(){printf("***************Welcome to Student Management System***************\n");printf("** **\n");printf("** 1.administrator Login er Login 3.exit system **\n");printf("** **\n");printf("******************************************************************\n");printf("your choice:[ ]\b\b");}//管理员功能菜单void display_admin_function(){printf("***********************************************\n");printf("**** M | 1.add student ****\n");printf("**** | 2.save stdudent information ****\n");printf("**** E | 3.alter student information ****\n");printf("**** | 4.search for student information ****\n");printf("**** N | 5.delete student information ****\n");printf("**** | 6.display student information ****\n");printf("**** U | 7.exit ****\n");printf("***********************************************\n");}//学生功能菜单void display_user_function(){printf("============student login============\n");printf("** 1.check information **\n");printf("** 2.change password **\n");printf("** 3.exit **\n");printf("=====================================\n");}//管理员功能选择int Admin_function(){int ach;while(1){display_admin_function();printf("select your choice[ ]\b\b");scanf("%d",&ach);switch(ach){case 1: Add_student(); break;case 2: save(); break;case 3: alter_student(); break;case 4: search(); break;case 5: delete_student(); break;case 6: display_student(); break;case 7: display_Main_Menu(); return 0;default: printf("repeat!\n"); break;}}}//学生功能选择int user_function(){int uch;int back=0;while(1){display_user_function();printf("hello,student make your choice[ ]\b\b");scanf("%d",&uch);switch(uch){case 1: display_student(); break;case 2: change_password(); break;case 3: back=1; return back;default: printf("everything is ok\n"); break;}return back;}int main(){int choice;load();display_Main_Menu();while(1){scanf("%d",&choice);switch(choice){case 1: if(admin_login_confirm()==1) {Admin_function(); break;}else{printf("you have input wrong password 3 times! exit the system...\n");return 0;}case 2: if(student_login()==1) {if(user_function()==1) return 0;elsebreak;}elseprintf("you have input wrong password 3 times! exit the system...\n");return 0;case 3: return 0;default: printf("please input 1~3\n");display_Main_Menu();break;}}}。

c语言程序设计学生信息管理系统学生信息管理是学校管理系统中非常重要的一部分，因此我们需要一个高效的系统进行管理。

在此背景下，C语言程序设计可以成为一个非常有用的工具。

首先，我们需要定义学生信息的数据结构。

通常情况下，学生信息包括姓名，性别，年龄，出生日期，籍贯，班级等等。

我们可以使用结构体来定义这个数据类型，代码如下：```typedef struct{char name[20];char sex[10];int age;char birth[20];char place[20];char clazz[20];}STUDENT;```其中，我们使用了char数组来存储字符串类型的数据。

在使用数组之前，我们需要考虑数据大小，以免溢出。

在这里，我们将数组的大小设置为了20。

接下来，我们需要实现学生信息的输入和输出功能。

我们可以使用scanf函数来输入信息，使用printf函数来输出信息。

代码如下：```void input_stu(STUDENT *stu){printf("Input Student's Name:");scanf("%s",stu->name);printf("Input Student's Gender:");scanf("%s",stu->sex);printf("Input Student's Age:");scanf("%d",&stu->age);printf("Input Student's Birth:");scanf("%s",stu->birth);printf("Input Student's Place:");scanf("%s",stu->place);printf("Input Student's Class:");scanf("%s",stu->clazz);}void output_stu(STUDENT *stu){printf("Name:%s\n",stu->name);printf("Gender:%s\n",stu->sex);printf("Age:%d\n",stu->age);printf("Birth:%s\n",stu->birth);printf("Place:%s\n",stu->place);printf("Class:%s\n",stu->clazz);}```注意，在使用scanf函数输入字符串类型的数据时，应该使用%s 格式控制符。

学生信息管理系统c语言1. 简介学生信息管理系统是一个基于C语言开发的程序，用于管理学校或教育机构中的学生信息。

该系统可以实现学生信息的录入、查询、修改和删除等功能，并且支持数据的持久化存储。

本文档将介绍学生信息管理系统的功能、使用方法以及具体实现细节。

2. 功能学生信息管理系统具有以下主要功能：2.1 录入信息该系统可以通过用户输入的方式录入学生的基本信息，包括学号、姓名、性别、年龄、班级等。

其中，学号是唯一的标识符，用于区分不同的学生。

2.2 查询信息用户可以通过学号或姓名查询特定学生的信息。

系统会根据用户提供的查询条件，在学生信息数据库中查找匹配的学生记录，并将结果显示给用户。

2.3 修改信息用户可以修改已录入学生的信息，包括姓名、性别、年龄、班级等。

系统会根据用户提供的学号，在学生信息数据库中找到相应的学生记录，并将其修改为用户输入的新信息。

2.4 删除信息用户可以根据学号删除某个学生的信息。

系统会在学生信息数据库中找到匹配的学生记录，并将其从数据库中删除。

3. 使用方法学生信息管理系统的使用方法如下：3.1 编译和运行程序首先，需要将C源代码编译成可执行文件。

在命令行中输入以下命令：gcc main.c -o student_system然后，运行编译得到的可执行文件：./student_system3.2 界面操作系统运行后，会显示一个简单的命令行界面，用户可以通过键盘输入指定的命令来执行相应的操作。

以下是系统支持的命令列表：•add：录入学生信息•search：查询学生信息•modify：修改学生信息•delete：删除学生信息•exit：退出系统用户可以根据提示输入相应的命令，并按下回车键确认。

系统会根据用户输入执行相应的操作，然后返回到命令行界面，等待下一次输入。

4. 实现细节学生信息管理系统的实现细节如下：4.1 数据存储系统使用文件来持久化存储学生信息。

每个学生的信息被保存在一个独立的记录中，记录之间使用换行符进行分隔。

学生管理系统c语言简单版学生管理系统c语言简单版介绍：学生管理系统是一种用于管理学生信息的软件，它可以方便地对学生的基本信息、课程成绩等进行录入、查询、修改和删除等操作。

本文将介绍如何使用C语言编写一个简单的学生管理系统。

功能：1. 添加学生信息2. 查询学生信息3. 修改学生信息4. 删除学生信息5. 显示所有学生信息实现方法：1. 添加学生信息添加学生信息需要输入以下内容：姓名、性别、年龄、班级和电话号码。

我们可以定义一个结构体来存储这些信息，代码如下：```struct Student {char name[20];char sex[10];int age;char class[20];char phone[20];};```然后定义一个数组来存储多个学生的信息：```struct Student students[100];int count = 0; // 学生数量```接下来，我们可以编写一个函数来添加新的学生信息：```void addStudent() {struct Student student;printf("请输入姓名：");scanf("%s", );printf("请输入性别：");scanf("%s", student.sex);printf("请输入年龄：");scanf("%d", &student.age);printf("请输入班级：");scanf("%s", student.class);printf("请输入电话号码：");scanf("%s", student.phone);students[count++] = student; // 将新的学生信息存储到数组中 printf("添加成功！\n");}```2. 查询学生信息查询学生信息可以按照姓名或电话号码进行查询。

#include <stdio.h>#include <string.h>/* 谭法建立单链表和输出单链表*/#include <malloc.h>#include <stdlib.h>typedef struct node{ int num;char name[20];struct node *next;}STD;#define LEN sizeof(STD)int menu_select();void handle_menu1();void game4();void game2();STD *insert(STD *head,STD *stud);STD *insert2(STD *head,STD *stud); void game3();void game5();STD *delete(STD*head,long num);void game1();void game6();STD *search(STD*head,long num);STD *head1,*head2;int n=0;/*追加法建表*/void creat1(void){ STD *p1,*p2;system("CLS");head1=NULL;p1=(STD *)malloc(LEN);p2=p1;printf("建表方法1追加法建表!\n");printf("输入学号姓名,若输入学号为0则退出建表!\n");scanf("%d%s",&p1->num,p1->name);while(p1->num!=0){ n++;if(n==1)head1=p1;elsep2->next=p1;p2=p1;p1=(STD *)malloc(LEN);scanf("%d%s",&p1->num,p1->name);}free(p1); p2->next=NULL;scanf("%*c");printf("按回车键继续!\n");getchar();system("CLS");return ;}/* 插入法建表*/void creat2(void){ STD *p1;head2=NULL;system("CLS");p1=(STD *)malloc(LEN);printf("建表方法2插入法建表!\n");printf("输入学号姓名(输入学号以0结束)!\n");scanf("%d%s",&p1->num,p1->name);while(p1->num!=0){ p1->next=head2;head2=p1;p1=(STD *)malloc(LEN);scanf("%d%s",&p1->num,p1->name);}scanf("%*c");printf("按回车键继续!\n");getchar();system("CLS");free(p1);return ;}/* 链表输出*/void print(STD *head){ STD *p;p=head;while (p!=NULL){ printf("学号%3d 姓名%s\n",p->num,p->name); p=p->next;} printf("链表为空!\n");scanf("%*c");printf("按回车键继续!\n");getchar();system("CLS");}/*-------------------------------------------------*//*--------------表1插入结点函数-------*//*-------------------------------------------------*/void game4(){char ch;STD *stud,*head=head1;system("CLS");printf("\t仅限在表1中插入!\n");printf("\t输入要插入结点的学号和姓名(以空格隔开):");stud=(STD *)malloc(LEN);scanf("%*c");scanf("%d%s",&stud->num,&stud->name);if(stud->num<0){ printf("\t输入的学号不能为负数,请重新选择插入!\n");return;}while(stud->num>=0){head1=insert(head,stud);printf("\t继续插入新结点吗?(y/n):");ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入新结点学号姓名:(输入n结束插入)");stud=(STD *)malloc(LEN);scanf("%*c");scanf("%d%s",&stud->num,&stud->name);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/*-------------------------------------------------*//*--------------表2插入结点函数-------*//*-------------------------------------------------*/void game2(){char ch;STD *stud,*head=head2;system("CLS");printf("\t仅限在表2中插入!\n");printf("\t输入要插入结点的学号和姓名(以空格隔开):");stud=(STD *)malloc(LEN);scanf("%*c");scanf("%d%s",&stud->num,&stud->name);if(stud->num<0){ printf("\t输入的学号不能为负数,请重新选择插入!\n");return;}while(stud->num>=0){head2=insert2(head,stud);printf("\t继续插入新结点吗?(y/n):");ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入新结点学号姓名:(输入n结束插入)");stud=(STD *)malloc(LEN);scanf("%*c");scanf("%d%s",&stud->num,&stud->name);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/**************************************//* 插入模块*//**************************************/STD *insert(STD *head,STD *stud){STD *p0,*p1,*p2;p1=head;p0=stud;if(head==NULL){head=p0;p0->next=NULL;}else{while((p0->num>p1->num)&&(p1->next!=NULL)){p2=p1; p1=p1->next;}if(p0->num<=p1->num){if(head==p1)head=p0;else p2->next=p0;p0->next=p1;}else{p1->next=p0;p0->next=NULL;}}n=n+1;printf("按回车键继续!\n");getchar();system("CLS");return (head);}/**************************************//* 插入模块2 *//**************************************/STD *insert2(STD *head,STD *stud){STD *p0,*p1,*p2;p1=head;p0=stud;if(head==NULL){head=p0;p0->next=NULL;}else{while((p0->num<p1->num)&&(p1->next!=NULL)){p2=p1; p1=p1->next;}if(p0->num>=p1->num){if(head==p1)head=p0;else p2->next=p0;p0->next=p1;}else{p1->next=p0;p0->next=NULL;}}n=n+1;printf("按回车键继续!\n");getchar();system("CLS");return (head);}/*-------------------------------------------------*//*--------------表1删除学生信息-------*//*-------------------------------------------------*/void game3(){ int num;char ch;STD *head=head1;printf("\t仅限在表1中删除!\n");printf("\t输入要删除的学号:");scanf("%*c");scanf("%ld",&num);if(num<0){ printf("\t输入的学号不能为负数,请重新选择删除!\n");return;}while(num>=0){head=head1;head1=delete(head,num);printf("\t继续删除吗?(y/n):");scanf("%*c");ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入要删除的学号:(输入n结束删除！)");scanf("%*c");scanf("%ld",&num);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/*-------------------------------------------------*//*--------------表2删除学生信息-------*//*-------------------------------------------------*/void game5(){ int num;char ch;STD *head=head2;printf("\t仅限在表2中删除!\n");printf("\t输入要删除的学号:");scanf("%*c");scanf("%ld",&num);if(num<0){ printf("\t输入的学号不能为负数,请重新选择删除!\n");return;}while(num>=0){head=head2;head2=delete(head,num);printf("\t继续删除吗?(y/n):");scanf("%*c");ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入要删除的学号:(输入n结束删除！)");scanf("%*c");scanf("%ld",&num);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/**************************************//* 删除模块*//**************************************/STD *delete(STD*head,long num){STD *p1,*p2;if (head==NULL) {printf("\n没有找到该学号!\n");return head;} p1=head;while(num!=p1->num&&p1->next!=NULL){p2=p1;p1=p1->next;}if(num==p1->num){if(p1==head)head=p1->next;else p2->next=p1->next;printf("\n删除:%ld\n",num);n=n-1;}elseprintf("\n 没有发现此项! \n",num);system("CLS");return(head);}/*-------------------------------------------------*//*--------------表1查找学生信息-------*//*-------------------------------------------------*/void game1(){ int num;char ch;STD *head=head1;printf("\t仅限在表1中查找!\n");printf("\t输入要查找的学号:");scanf("%ld",&num);if(num<0){ printf("\t输入的学号不能为负数,请重新查找!\n");return;}while(num>=0){head=head1;head1=search(head,num);printf("\t继续查找吗?(y/n):");scanf("%d",&num);ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入要查找的学号:(输入n结束查找)");scanf("%ld",&num);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/*-------------------------------------------------*//*--------------表2查找学生信息-------*//*-------------------------------------------------*/void game6(){ int num;char ch;STD *head=head2;printf("\t仅限在表2中查找!\n");printf("\t输入要查找的学号:");scanf("%ld",&num);if(num<0){ printf("\t输入的学号不能为负数,请重新查找!\n");return;}while(num>=0){head=head2;head2=search(head,num);printf("\t继续查找吗?(y/n):");scanf("%d",&num);ch=getchar();if(ch=='y'||ch=='Y'){ printf("\t输入要查找的学号:(输入n结束查找)");scanf("%ld",&num);}elsebreak;}printf("\t输入回车键返回!\n");getchar();system("CLS");printf("\n");}/**************************************//* 查找模块*//**************************************/STD *search(STD*head,long num){STD *p1,*p2;if (head==NULL) {printf("\n没有找到该学号!\n");return head;} p1=head;while(num!=p1->num&&p1->next!=NULL){p2=p1;p1=p1->next;}if(num==p1->num)printf("\n%d %s\n",p1->num,p1->name);elseprintf("\n 没有发现此项! \n",num);return(head);}/* void main(){printf(" *** 运行结果***\n");printf("输入学号姓名(输入学号以0结束)!\n");creat1();print(head1);creat2();print(head2);} *///******************************//* select.cpp:主程序文件*//******************************void main(){handle_menu1();}//*****************************//* 菜单处理函数*//*****************************void handle_menu1(){int h;for(;;){h=menu_select();switch(h){ case 1:/* printf("\t进入追加法建表\n"); */creat1();break; /* 调用功能模块*/case 2:/* printf("\t进入插入法建表\n"); */creat2();break;case 3:/* printf("\t输出追加法链表的结果\n"); */print(head1);break;case 4:/* printf("\t输出插入法链表的结果\n"); */print(head2);break;case 5:/* printf("\t链表1插入\n"); */game4();break;case 6:/* printf("\t链表2插入\n"); */game2();break;case 7:/* printf("\t链表1删除\n"); */game3();break;case 8:/* printf("\t链表2删除\n"); */game5();break;case 9:/* printf("\t链表1查找\n"); */game1();break;case 10:/* printf("\t链表2查找\n"); */game6();break;case 11:printf("\t再见,欢迎再次使用本系统!谢谢！\n");return;}}}//**********************************//* 菜单选择函数: int menu_select()*//**********************************int menu_select(){int cn;for(;;){printf("\ \n");printf("\t1.追加法建表\n");printf("\ \n");printf("\t2.插入法建表\n");printf("\ \n");printf("\t3.输出链表1\n");printf("\ \n");printf("\t4.输出链表2\n");printf("\ \n");printf("\t5.插入链表1 \n");printf("\ \n");printf("\t6.插入链表2 \n");printf("\ \n");printf("\t7.删除链表1 \n");printf("\ \n");printf("\t8.删除链表2 \n");printf("\ \n");printf("\t9.查找链表1 \n");printf("\ \n");printf("\t10.查找链表2 \n");printf("\ \n");printf("\t11.退出系统\n");printf("\ \n");printf("\t请您选择1-11:");scanf("%d",&cn);//gets(s);//cn=atoi(s);if(cn<1||cn>11)printf("\n\t输入错误,重选1-11:");elsebreak;}return cn;}。

#define PRINT0 printf("name:%s\nsex:%s\nage:%d\nID_card:%d\naddress:%s\n",st[i].name,st[i].sex,st[i].age,st[i] .ID_card,st[i].addr)#define PRINT1 printf("prefession:%s\nstudent_number:%d\n*****score*****\nwuli:%d\n",st[i].prefession,st[i] .student_number,st[i].score.wuli)#define PRINT2 printf("gaoshu:%d\nyingyu:%d\ntiyu:%d\naverage: %d\n",st[i].score.gaoshu,st[i].score.yingyu,st[i ].score.tiyu,st[i].score.aver)#define print1 printf("________________________________")#define N 2#include "string.h"#include "stdio.h"int sum=0;struct score{int wuli;int gaoshu;int yingyu;int tiyu;int aver;};struct message{ char name[10];int age;char sex[5];int ID_card;char addr[30];char prefession[30];int student_number;struct score score;}st[100];/*************write message*************/write_message(){ int flag;char chioce;do{system("cls");flag=2; sum++;printf("_______________________________");printf("please input student's message:\n");printf("\n");print1;printf("%dth student message:",sum);print1;printf("\nname:");scanf("%s",st[sum].name);printf("\nsex:");scanf("%s",st[sum].sex);printf("\nage:");scanf("%d",&st[sum].age);printf("\nID_card:");scanf("%d",&st[sum].ID_card);printf("\naddress:");scanf("%s",st[sum].addr);printf("\nprefession:");scanf("%s",st[sum].prefession);printf("\nschool number:");scanf("%d",&st[sum].student_number);printf("\n*****score******\n");printf("wuli:");scanf("%d",&st[sum].score.wuli);printf("\ngaoshu:");scanf("%d",&st[sum].score.gaoshu);printf("\nyingyu:");scanf("%d",&st[sum].score.yingyu);printf("\ntiyu:");scanf("%d",&st[sum].score.tiyu);printf("\naverage:");scanf("%d",&st[sum].score.aver);do{printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");getchar();scanf("%c",&chioce);printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}else if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);save_message();}/*************save message****************/save_message(){ FILE *fp;int i;if((fp=fopen("student.txt","wb"))==NULL){printf("read error \n");printf("press any key back to menu\n");getch();exit(1);}for(i=0;i<sum;i++)if(fwrite(&st[i],sizeof(struct message),1,fp)!=1){printf("write error\n");fclose(fp);}fclose(fp);printf("\n********___OK!___**********\n___press any key back___");sum=i;bioskey(0);}/***************add message*****************/add_message(){int i,j,flag; char chioce;i=0;j=sum-1;flag=0;do{ system("cls");i++; j++;print1;printf("add %dth student's meaasge\n",i);print1;printf("\nname:");scanf("%s",st[j].name);printf("\nsex:");scanf("%s",st[j].sex);printf("\nage:");scanf("%d",&st[j].age);printf("\nID_card:");scanf("%d",&st[j].ID_card);printf("\naddress:");scanf("%s",st[j].addr);printf("\nprefession:");scanf("%s",st[j].prefession);printf("\nstudent_number:");scanf("%d",&st[j].student_number);printf("\n*****score******\n");printf("wuli:");scanf("%d",&st[j].score.wuli);printf("\ngaoshu:");scanf("%d",&st[j].score.gaoshu);printf("\nyingyu:");scanf("%d",&st[j].score.yingyu);printf("\ntiyu:");scanf("%d",&st[j].score.tiyu);printf("\naverage:");scanf("%d",&st[j].score.aver);printf("\n\nweather add %dth student's message: \n",i+1);do{printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");getchar();scanf("%c",&chioce);printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}else if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;}while(1);}while(flag==1);sum=j+1;save_message();}/**********inqiure message******/inqiure_message(){int chioce;do{system("cls");printf("**********choose 0-3**********\n\n\n");printf(" 1:name inquire\n\n\n");printf(" 2:IDcard inqiure\n\n\n");printf(" 3:student_number\n \n\n");printf(" 0:back menu\n\n\n");scanf("%d",&chioce);switch(chioce){case 1: name_inqiure();break;case 2: ID_card_inqiure();break;case 3: grade_inqiure();break;case 0:break;}}while(chioce!=0);}/**********name inqiure*********/name_inqiure(){char NAME[30];int i; int flag,k;char chioce;do{ system("cls");k=0;printf("please input the message you inqiure");printf("\nname:");scanf("%s",NAME);getchar();printf("\n");for(i=0;i<sum;i++){if(strcmp(st[i].name,NAME)==0){PRINT0;PRINT1;PRINT2;k=1;}}if(k==0) printf("without message you inqiure\n");do{ printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");scanf("%c",&chioce); getchar();printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);printf("press any key return to menu");bioskey(0);}/**********IDcard inqiure*********/ID_card_inqiure(){int card;int i; int flag,k;char chioce;do{ clrscr(); k=0;printf("please input the message you inqiure");printf("\nIDcard:");scanf("%d",&card);getchar();printf("\n");for(i=0;i<sum;i++){if(st[i].ID_card==card){PRINT0;PRINT1;PRINT2;k=1;}}if(k==0) printf("without message you inqiure\n");do{ printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");scanf("%c",&chioce); getchar();printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);printf("press any key return to menu");bioskey(0);}/*********grade inqiure***********/grade_inqiure(){int GRADE;int i; int flag,k;char chioce;do{ system("cls");k=0;printf("please input the message you inqiure");printf("\nstudent_number:");scanf("%d",&GRADE);getchar();printf("\n");for(i=0;i<sum;i++){if(st[i].student_number==GRADE){PRINT0;PRINT1;PRINT2;k=1;}}if(k==0) printf("without message you inqiure\n");do{ printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");scanf("%c",&chioce); getchar();printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);printf("press any key return to menu");bioskey(0);}/*********change message**********/change_message(){char pre[30],chioce;int i,gra,flag,num,s;s=0;do{system("cls");printf("please input message you want to change\n ");printf("student_number:");scanf("%d",&gra); getchar();for(i=0;i<sum;i++){if(st[i].student_number==gra){PRINT0;PRINT1;PRINT2;printf("\n********input message you want to change********\n");printf("0:name***1:sex***2:age***3:ID_card***4:address***\n5:prefession***6:wuli***7:stud ent_number***8\n:gaoshu***9:yingyu***10:tiyu***11:average***________\n");printf("choose 0-11\n");scanf("%d",&num); getchar();switch(num){case 0: printf("input the name changed\n");scanf("%s",st[i].name); getchar(); break;case 1: printf("input the sex changed\n");scanf("%s",st[i].sex); getchar(); break;case 2: printf("input the age changed\n");scanf("%d",&st[i].age); getchar(); break;case 3: printf("input the ID_card changed\n");scanf("%d",&st[i].ID_card); getchar(); break;case 4: printf("input the address changed\n");scanf("%s",st[i].addr); getchar(); break;case 5: printf("input the prefession changed\n");scanf("%s",st[i].prefession); getchar(); break;case 6: printf("input the wuli_score changed\n");scanf("%d",&st[i].score.wuli); getchar(); break;case7: printf("input the student_number changed\n");scanf("%d",&st[i].student_number); getchar(); break;case 8: printf("input the gaoshu_score changed\n");scanf("%d",&st[i].score.gaoshu); getchar(); break;case 9: printf("input the yingyu_score changed\n");scanf("%d",&st[i].score.yingyu); getchar(); break;case 10: printf("input the tiyu_score changed\n");scanf("%d",&st[i].score.tiyu); getchar(); break;case 11: printf("input the average_score changed\n");scanf("%d",&st[i].score.aver); getchar(); break;default: printf("input error\n"); break;}printf("\n*********the changed message*********\n\n");PRINT0;PRINT1;PRINT2;s=1;}}if(s!=1) printf("without message you want to change\n");do{ printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");scanf("%c",&chioce); getchar();printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);save_message();}/*********delete message**********/delete_message(){ int GRADE;int i,j,flag1,flag;char chioce1,chioce2;flag1=3;flag=3;do{ system("cls");printf("please input student's student_number you want to delete\n");printf("student_number:");scanf("%d",&GRADE); getchar();for(i=0;i<sum;i++)if(st[i].student_number==GRADE){do{PRINT0;PRINT1;PRINT2;printf("\n******************************\n_________________ _________________\n");printf("press y/Y deleted:\npress n/N cancel:\n");scanf("%c",&chioce1);getchar();system("cls");if(chioce1=='y'||chioce1=='Y') flag1=1;else if(chioce1=='n'||chioce1=='N') return;else {printf("***input error***\n___press any ker return___\n"); bioskey(0);}}while(flag1!=1);for(j=i;j<sum;j++){ st[j]=st[j+1];flag=2;printf("message was deleted\n");sum-=1; }}if(flag!=2) printf("without message you want to delete\n");do{printf("press y/Y continue:\npress n/N stop:\n");scanf("%c",&chioce2);printf("****************************\n");if(chioce2=='y'||chioce2=='Y') {flag=1; break;}else if(chioce2=='n'||chioce2=='N') {flag=0; break;}else {system("cls");printf("input error\n");}print1;printf("\n");}while(1);}while(flag==1);save_message();}/************insert message*************/insert_message(){ int chioce,flag,i; flag=2;do{system("cls");printf("please input the number of people you insert\n");scanf("%d",&chioce);if(chioce>=sum){printf("xin xi pai zai zui hou ");chioce=sum;}for(i=sum;i>chioce;i--) st[i]=st[i-1];printf("\nplease input message you insert");printf("\nname:");scanf("%s",st[i].name);printf("\nsex:");scanf("%s",st[i].sex);printf("\nage:");scanf("%d",&st[i].age);printf("\nID_card:");scanf("%d",&st[i].ID_card);printf("\naddress:");scanf("%s",st[i].addr);printf("\nprefession:");scanf("%s",st[i].prefession);printf("\ngrade:");scanf("%d",&st[i].student_number);printf("\n*****score******\n");printf("wuli:");scanf("%d",&st[i].score.wuli);printf("\ngaoshu:");scanf("%d",&st[i].score.gaoshu);printf("\nyingyu:");scanf("%d",&st[i].score.yingyu);printf("\ntiyu:");scanf("%d",&st[i].score.tiyu);printf("\naverage:");scanf("%d",&st[i].score.aver);sum+=1;do{printf("****************************\n");printf("press y/Y continue:\npress n/N stop:\n");getchar();scanf("%c",&chioce);printf("****************************\n");if(chioce=='y'||chioce=='Y') {flag=1; break;}else if(chioce=='n'||chioce=='N') {flag=0; break;}else printf("input error\n");print1;printf("\n");}while(1);}while(flag==1);save_message();}/*********school_number_order***********/grade_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].student_number>st[j].student_number){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("grade order from min to max\n");for(i=0;i<sum;i++){ print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);bioskey(0);}/***********wuli score order***************/wuli_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].score.wuli>st[j].score.wuli){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("wuli score order from min to max\n");for(i=0;i<sum;i++){print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);print1;bioskey(0);}/***********gaoshu score order***************/gaoshu_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].score.gaoshu>st[j].score.gaoshu){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("gaoshu score order from min to max\n");for(i=0;i<sum;i++){print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);print1;bioskey(0);}/***********yingyu score order***************/yingyu_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].score.yingyu>st[j].score.yingyu){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("yingyu score order from min to max\n");for(i=0;i<sum;i++){print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);print1;bioskey(0);}/***********tiyu score order***************/tiyu_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].score.tiyu>st[j].score.tiyu){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("yitu order from min to max\n");for(i=0;i<sum;i++){print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);print1;bioskey(0);}/***********average score order***************/average_order(){int i,j;system("cls");if(sum==0) {printf("**********no message**********\n____press any key return____");getch();return;}for(i=0;i<sum;i++)for(j=i+1;j<sum;j++)if(st[i].score.wuli>st[j].score.wuli){ st[sum+1]=st[i];st[i]=st[j];st[j]=st[sum+1];}printf("average score order from min to max\n");for(i=0;i<sum;i++){print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;getch();system("cls");}print1;printf("\ntotle num :%d\npress any key return to menu\n",sum);print1;bioskey(0);}/********order message****************/order_message(){int chioce;do{system("cls");printf("**********choose 0-6**********\n\n");printf(" 1:grade order\n\n");printf(" 2:wuli score order\n\n");printf(" 3:gaoshu score order\n \n");printf(" 4:ying yu score order\n\n");printf(" 5:tiyu score order\n\n");printf(" 6:average score order\n\n");printf(" 0:back menu\n\n");scanf("%d",&chioce);switch(chioce){case 1: grade_order();break;case 2: wuli_order();break;case 3: gaoshu_order();break;case 4: yingyu_order();break;case 5: tiyu_order();break;case 6: average_order();break;case 0:break;}}while(chioce!=0);}/**********answer secretory***********/mima_message(){int flag;char answer[10];char secret[10]="abcd";flag=2;do{system("cls");printf("\n______________________mi ma wei 'abcd'________________\n\n");printf("______________________qing shu ru mi ma:");scanf("%s",answer);getchar();if(strcmp(secret,answer)==0){flag=1;printf("\n\n =====throngh=====\n\n\n");printf("____________________press any key into next:\n");bioskey(0);}else{flag=0;printf("______________________input error:\n");printf("______________________press any key to return:\n");bioskey(0);}}while(flag!=1);}/*********read message****************/read_message(){int i;system("cls");if(sum<=0){ printf("without message\n");getch();return;}for(i=0;i<sum;i++){system("cls");print1;printf("\n%dth student's mssage\n",i+1);print1;printf("\n");PRINT0;PRINT1;PRINT2;printf("\n********press any key -show the next one********\n ");getch();}printf("________________totle num :%d________________\n",sum); printf("_____________press any key return______________\n"); bioskey(0);}/*************************************/main(){int chioce,flag;mima_message();do{system("cls");chioce=9;printf("**********************************************\n");printf("****welcome to system of managing students****\n");printf("**********************************************\n\n");printf("-------------------choose 0-8-----------------\n\n");printf(" 1:write message\n\n");printf(" 2:add message\n\n");printf(" 3:inqiure name\n\n");printf(" 4:change message\n\n");printf(" 5:insert message\n\n");printf(" 6:order message\n\n");printf(" 7:delete message\n\n");printf(" 8:read messaeg\n\n");printf(" 0:***exit***\n\n");scanf("%d",&chioce);getchar();switch(chioce){case 1: write_message();break;case 2: add_message();break;case 3: inqiure_message();break;case 4: change_message();break;case 5: insert_message();break;case 6: order_message();break;case 7: delete_message();break;case 8: read_message();break;case 0: printf("___sure press y/Y:___\n\n___no sure press n/N:___");scanf("%c",&chioce);getchar();if(chioce=='y'||chioce=='Y') flag=0;else flag=1;break;default : printf("\n ___input error___\n\n");printf("***press any key to go on***\n");getch();break;}}while(flag!=0);save_message();system("cls");printf("\n\n___message was saved___\n\n\n*****file name is student.txt*****\n");bioskey(0);}。

if(i<1||i>L.length+1)
return 0;
for(k=i;k<=L.length;k++)
{
L.elem[k-1]=L.elem[k]; //将后面元素依次前移}
L.length--;
return 1;
}
四、实验体会
1、存在问题
1.
起初未将变量名启用数组的形式，通过调试发现姓名无法储存，学号只能储存一位数字，深刻体会存储字节的问题。

2.
关于结构体的嵌套，如何引用其中变量问题有了深刻体会。

3.
观察到老师给的代码中sqlist &L,而我均未使用&引用符号，依然可以运行。

于是查找资料编写
此时的Head（地址）的值与L相同！
若将引用符号&删去，则L不将改变Head的值，故&有种将传进去的参数“带出来”的作用。

于是发现即便插入了数据，再次输出时未显示插入的数据，于是进行改进加上&
果然插入的信息可以输出。

2、心得体会
1.复习了switch case 以及strcmp比较函数的用法；
2.学会增删操作中元素前后移的实现；
3.这次实验让我真正的明白了sqList &L的使用：在函数调用中引用变量一定要初始化才可以使用。

要返回到main里面进行操作、改变的顺序表需要带上&，如果只在对应函数操作的顺序表则不用。